Hi Frank,
You will need to follow the same procedure when you get to the big ends:
1) finish the outside of the bearing a few mm oversize
2) neatly saw in half along the join line
3) face the cut surfaces by filing or machining
4) soft solder the parts together
5) bore out the bearing to size and finish any other work on it for instance drill through the holes for the retaining bolts tapping size only
6) heat up to melt the solder and wipe the solder off the faces or file if you’re not quick enough to do this.
Then you can drill the clearance holes in the correct bearing half the take an ordinary 4BA bolt
Job Done!
Regards
Nick